Print the previous day in PHP, the print format is May 10, 2007 22:21:21

Answer 1:

<? PHP Echo Date (' Y '. ' Year '. ' M '. ' Month '. ' d '. ' Day '. ' H:i:s ',strtotime('-1 day '));

Output Result:

Warning:strtotime (): It is not safe for rely on the system ' s timezone settings. You is *required* to use the Date.timezone setting or the Date_default_timezone_set () function. In case you used any of those methods and you is still getting this warning, your most likely misspelled the timezone Iden Tifier. We selected the timezone ' UTC 'for "Now," "Set Date.timezone to select your timezone." In C:\AppServ\www\test2.php on Line 2warning:date (): It isn't safe to rely on the system' s timezone settings. You is *required* to use the Date.timezone setting or the Date_default_timezone_set ()function. Inch CaseYou used any of those methods and is still getting ThisWarning, you are most likely misspelled the timezone identifier. We selected the timezone ' UTC ' forNow, if you set Date.timezone to select your timezone.inchC:\AppServ\www\test2.php on line 22017-03-01 15:06:41

Answer 2:

<? phpdate_default_timezone_set (' UTC '); Echo date (' Y '. ') Year '. ' M '. ' Month '. ' d '. ' Day '. ' H:i:s ', Strtotime ('-1 day '));

Operation Result:

March 01, 2017 15:06:43

Date ()- format a local time/date

string Date string $format $timestamp ] )

Returns a string timestamp that is the result of an integer in a given format string. If no timestamp is given, the local current time is used. In other words, timestamp it is optional and the default value is Time ().

Note: to convert the time that a string is expressed to a timestamp, you should use strtotime (). In addition some databases have some functions to convert their time format into timestamps (such as MySQL's?). Unix_timestamp function).

Strtotime ()- resolves a datetime description of any string to a Unix timestamp

Definition and Usage

The strtotime () function resolves the date or time description of any English text to a Unix timestamp (the number of seconds from January 1 1970 00:00:00 GMT).

Strtotime string $time $now  Time () ] )

Parameters

time: Date/Time string. The correct format is described in the date and time format .

now: The timestamp used to calculate the return value. If this argument is omitted, the current time is used.

return value

Success returns a timestamp, otherwise it is returned FALSE . This function returns 1on Failure before PHP 5.1.0.

Example

Resolves the English text date time to a Unix timestamp:

<?PHPEcho(Strtotime("Now"). "<br>");Echo(Strtotime("October 1980"). "<br>");Echo(Strtotime("+5 hours"). "<br>");Echo(Strtotime("+1 Week"). "<br>");Echo(Strtotime("+1 Week 3 days 7 hours 5 Seconds"). "<br>");Echo(Strtotime("Next Monday"). "<br>");Echo(Strtotime("Last Sunday"));?>

Operation Result:

Http://www.w3school.com.cn/php/func_date_strtotime.asp

http://php.net/manual/zh/function.strtotime.php

mktime- get a date for Unix timestamp

Date converted to timestamp

PHP provides functions that can easily convert various forms of a date to a timestamp, which is mainly:

• Strtotime (): Resolves the datetime description of any English text to a timestamp.
• Mktime (): Gets the timestamp from the date.

Print the previous day in PHP, the print format is May 10, 2007 22:21:21